Electronic cigarette



FIG. 1 is a perspective view of an electronic cigarette;

FIG. 2 is a front view of the electronic cigarette;

FIG. 3 is a rear view of the electronic cigarette;

FIG. 4 is a left side view of the electronic cigarette;

FIG. 5 is a right side view of the electronic cigarette;

FIG. 6 is a top view of the electronic cigarette; and,

FIG. 7 is a bottom view of the electronic cigarette.

The dashed broken lines in the drawings represent environmental subject matter that forms no part of the claimed design. 

CLAIM The ornamental design for an electronic cigarette, as shown and described. 